Raising fillet for raising machines



March 29, 1927.

' C. WALKER RAISING NILLET FOR RAISING MACHINES Filed Nov. '7, 1925 Patented Mar. 29, 1927. v

PATENT OFFICE.

CARL WALKER, OF CALW, GERMANY.

RAISING FILLET FOR RAISING MACHINES.

Application filed November 7, 1925, Serial No. 67,539, and in Germany April 9, 1925.

Raising fillets as already proposed for card clothing in raising machines have teeth terminating in points similar to the points of needles with the result that the material to be treated has to pass several times through the raising machine until the entire surface of the material has been sufliciently teasled.

The present invention provides therefore a raising fillet the teeth of which are of such a shape that the teasling or napping can not only be effected in a considerably shorter period of time than heretofore but the material is also protected inasmuch as the core thereof is no longer injured. These advantages are secured according to this invention by making the operative ends of the teeth fiat with knife edges that is to say the teeth are of a certain width and are positioned with their width extending transversley of the direction of the work. They consequently cover a substantially greater portion of the surface of the material to be treated than do teeth of the known type so that the teasling or napping takes place more rapidly than heretofore. Furthermore the ends owing to their wide shape no longer injure the core of the material as is frequently the case with the needle-shaped points so that the material is treated under the greatest possible pro tect-ion.

The Wide shape is extraordinarily simple to produce for example by pressing the point out flat either by a blow or by pressure or in any other way. In, like manner an originally fiat wire may be used for the material of the teeth and. therefore has only to be ground at the ends to produce knife edges.

The subject matter of the present invention is illustrated in detail by a preferred embodiment in the accompanying drawing in which:

Figure 1 shows in side elevation a I ortion of a raising fillet constructed accor ing to this invention.

Figure 2 is an end elevation of the same.

Figure 8 is a plan view of Figures 1 and 2.

Figure 4 shows the subject matter of the invention in perspective on a considerably larger scale.

The teeth a of the raising fillet are per se of the usual bent shape and every two teeth aligned transversely of the belt I) may form in the well known way a single U-shaped bent piece as shown in Figure 4. They are likewise inserted in the belt I) in the usual way and are also staggered as heretofore.

According to the present invention the ends 0 of the teeth a are flat so that they are as sharp as a knife. The flattening is so situated that it runs transversely of the work- 30 ing direction and the ends 0 cover a larger surface than heretofore.

The flat form may be produced in any way that may be desired that is to say it may be obtained by pressing the material flat.

I claim A raising fillet for raising or napping machines, including teeth having flat ends with knife edges lying with their width transversely of the workiu g direction.

In testimony whereof I affix my signature.

' CARL WALKER. 

